Co^(2+)(aq.)+SCN^(-)(aq.)to"Complex"(X) Ni^(2+)(aq.)+"Dimethylglyoxime"overset(NH_4OH)to"Complex"(Y). The coordination number of cobalt and nickel in complexes X and Y is four. Select the correct statement for the complexes (X) and (Y) .

Co^(2+)(aq.)+SCN^(-)(aq.)to"Complex"(X) Ni^(2+)(aq.)+"Dimethylglyoxim

1.	Co^(2+)(aq.)+SCN^(-)(aq.)to"Complex"(X) Ni^(2+)(aq.)+"Dimethylglyoxime"overset(NH_4OH)to"Complex"(Y). The coordination number of cobalt and nickel in complexes X and Y is four. Select the correct statement for the complexes (X) and (Y) .
Answer» (X) is paramagnetic with two unpaired electrons (Y) is diamagnetic and shows intermolecular H-bonding (X) is paramagnetic with THREE unpaired electrons and (Y) is diamagnetic (X) and (Y) both are diamagnetic Solution :`x=[Co(SCN)_4]^(2-)`, cobalt is in +2 oxidation state and `SCN^-` is weak FIELD ligand. So, `Y=[NI(DMG)_2]`:Nickel is in +2 oxidation state and dmg is chelating ligand. So, `[ni(dmg)_2]` shows intra molecular H-bonding as shown below . Reaction involved : `Co^(2+)(aq)+4SCN^(-)(aq)to[Co(SCN)_4]^(2-)(aq)` blue colour complex.